The authors explore how humans use decision making shortcuts (otherwise referred to as "heuristics"). Over time, humans, according to the authors, humans have developed decision making shortcuts to make decisions in (what another theorist calls) "fast and frugal ways."
Example? "The vividness criterion." Here, we use dramatic examples to shape our decisions. This is otherwise referred to as the "fallacy of the dramatic illustration." People often do not think through whether the dramatic instance is really typical. As a result, they may make decisins on the basis of poor information.
A fine book that sheds light on how we make decisions.